Title: Tracking Back the Solar Wind to its Photospheric Footpoints from Wind Observations -- A Statistical Study Show Chinese title

Title: 基于风任务观测追溯太阳风到光球脚点--一项统计研究

Abstract: It is of great importance to track the solar wind back to its photospheric source region and identify the related current sheets; this will provide key information for investigating the origin and predictions of the solar wind. We report a statistical study relating the photospheric footpoint motion and in-situ observation of current sheets in the solar wind. We used the potential force-free source--surface (PFSS) model and the daily synoptic charts to trace the solar wind back from 1 AU, as observed by the Wind spacecraft, to the solar surface. As the footpoints move along the solar surface we obtain a time series of the jump times between different points. These jumps can be within a cell and between adjacent cells. We obtained the distribution of the jump times and the distribution for a subset of the jump times in which only jumps between adjacent cells were counted. For both cases, the distributions clearly show two populations. These distributions are compared with the distribution of in-situ current sheets reported in an earlier work of Miao Peng and Li (2011). Its implications on the origin of the current sheets are discussed. Show Chinese abstract

Abstract: 将太阳风追溯到其光球源区并识别相关的电流片具有重要意义，这将为研究太阳风的起源和预测提供关键信息。 我们报告了一项关于光球足迹运动与太阳风中现场电流片观测之间关系的统计研究。 我们使用了势能强迫磁场源表面（PFSS）模型和每日综合图，从风号飞船在1 AU处观测的太阳风回溯到太阳表面。 随着足迹点沿太阳表面移动，我们获得了不同点之间跳跃时间的时间序列。 这些跳跃可以在一个单元内或相邻单元之间发生。 我们得到了跳跃时间的分布以及跳动时间子集的分布，在该子集中仅计算相邻单元之间的跳跃。 在这两种情况下，分布明显显示出两个群体。 这些分布与刘苗鹏和李（2011年）之前报道的现场电流片分布进行了比较。 讨论了其对电流片起源的影响。